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O'Fallon, Illinois Weather

O'Fallon, Illinois — live current conditions, hourly and 7-day forecasts, NWS alerts, aviation weather, radar and satellite imagery for O'Fallon, St. Clair County.

🌡️ Current Conditions
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24-Hour Forecast
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Current Conditions Detail
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7-Day Forecast
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✈️ Aviation Weather

Flight conditions near O'Fallon — sourced from the FAA Aviation Weather Center. Nearest reporting station: locating…

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🌿 Air Quality
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NWS Extended Forecast
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📡 Precipitation Radar

Live animated radar for O'Fallon and surroundings — RainViewer.

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🛰️ Satellite Imagery

NOAA GOES-16 GEOCOLOR — live animated loop updated every 10 minutes. Shows cloud cover, storm systems and weather patterns across the continental US.

NOAA GOES-16 CONUS GEOCOLOR satellite animated loop
🛰️ GEOCOLOR loop 🌡️ Infrared (IR) 🌀 NHC Hurricane Satellite 🔗 NOAA Full Viewer

Source: NOAA/NESDIS GOES-East · Public domain · Auto-updates on page reload

🌙 Astronomy
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About O'Fallon, Illinois

O'Fallon unfolds across a landscape of gentle, fertile plains, where the horizon stretches wide under a sky that often seems to hold its breath before a storm. The land here, a rich, dark loam, whispers of the agricultural bounty it has sustained for generations, its contours softened by rolling fields and the occasional stand of mature oak and maple trees. As the sun dips, it casts a warm, amber glow across the western edges of O'Fallon, painting the scattered farmsteads and the newer residential developments in a quiet, enduring light. The air, especially in the late afternoon, carries a faint, earthy scent, a mingling of freshly turned soil and the distant hum of life. The roots of O'Fallon run deep, tracing back to the pioneering spirit that first settled these Illinois prairies, drawn by the promise of fertile land and westward expansion. While its origins are agricultural, O'Fallon has steadily grown, its economy now a blend of commerce, industry, and the continuing legacy of farming that shapes the surrounding countryside. The town serves as a vital hub for the region, its streets alive with the daily commerce of families and businesses, a steady pulse that belies its tranquil appearance. Distinctive among its neighbors, O'Fallon has cultivated a character of pragmatic optimism, a place where the past is honored but the future is actively built, a characteristic reflected in its well-maintained parks and the vibrant community events that punctuate the year.

LocationO'Fallon, St. Clair County, Illinois
Coordinates38.592272°N, 89.911212°W
TimezoneCentral Time (America/Chicago)
ZIP Code(s)62269
Area Code217
Page generatedJune 2026
Weather dataOpen-Meteo (open-source), NOAA National Weather Service